Recording of the passage of a truck, with the Lom brand "Geofón" contact microphone. The microphone is on a lamppost. UCS Category: AMBTraf, SCIMisc. Duration: 00:25.
This is a sound file to calculate the speed of sound propagation in air. Two microphones 50 centimeters apart and a movie clapperboard to generate a sharp sound. Follow this tutorial to perform the experiment: lasonotheque.org/education-sonore-f4.html#propagation. UCS Category: TEST. Duration: 00:01.